Cut-off-valve gear



Patented June 26 fh/wfg@ Gf @MTM 1 UNiTED STATES ALEXANDER F. IVARD, OF DETROIT, MICHIGAN.

GoT-oFF-VALV'E GEAR.

SPECIFICATION forming part of Letters Patent No. 280,103, dated June 26, 1883.

Application filed March 10, 1883. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, ALEXANDER. F. WARD,

` of Detroit, inthe county of Ylfrayneand State 'the governor appliances which will simulta neously operatel bot-h cut-oit valvesat opposite ends of the engine and change their position automatically, as more fully hercinatter described.

Figure 1 is a sectional plan ot' a direct-acting engine with my improvements thereto attached. Fig. 2 is a detail in elevation. 3 is a perspective detail.

In the accompanying drawings, A, represents the cylinder of a direct-acting engine,

provided at each end with steam-inlet ports c, steam-chest B, and valves (l, of the usual construction, such yalves being actuated from the eccentric D by `means of the valve-stem E;

and the construction and operation of these parts are of the usual character.

F are the cut-ott' valves, each of which is connected to a valvestem, G- and GU The stem is secured to a shaft which is journaled in the box K, and this box is so constructed, as shown in ,F.ig. 3, that it may have a reciprocating motion on the slide L, being compelled thereto by the eccentric M and its connecting-rod N, one end of which is attached to a wrist-pin, O, projecting from one side ofthe sliding box. Both the eccentries l) and Mare driven by the shaft 1E. A .rocker-arm, Q, is adjustably secured to`tl1e shaft which carries the disk, between the box K and such disk, and to the free end of this arm is attached the connecting-rod R, the opposite end of which is secured tothe lever S, which is fulcrumed in the bearing T, and the opposite end of this lever is attached by the coimeeting-rod U to the governor V. By these means any variation in the load upon the cutvoif valves is immediately compensated for, and the slightest variation in the governor is immediately ctnnmuuicated to the cut-off valves.

That I claim as my invention is l. In a valve-gear, the combination, with the cut-oft valves connected loosely to the disk I, andthe disk l, hung upon a roekshaft journaled in a movable box, of the governor V and its connections with said rock-shaft, and means for reciprocating the slidin box, substantially as shown and set forth.

2. In combination with the cut-oft` valves, the rock-shaft carrying the disk I, and the connections between said valve and disk, the sliding box K, in which the shaft is journaled, having connections M N with thefshaft E, and the arm Q, rigid in the rock-shaft, having `connections R, S, and U with the governor V, all operating as and for the purposes set forth.

ALEXANDER F. XVARD.

Witnesses: i

H. S. SPRAGUE, E. SCULLY. 

